. ♪ ♪ this is a stunning work of technology. ♪ this is the 2013 lexus es and the first-ever es hybrid. this is the pursuit of perfection. then you'll love lactose-free lactaid® it's 100% real milk that's easy to digest so you can fully enjoy the dairy you love. lactaid®. for 25 years, easy to digest. easy to love. stonehenge. we have stone people out on the plaza here on 30 rock in new york city. >>> we're going to give you your forecast in a second. back to boston, where the moment of crisis led to moments of heroism. the lives of two men, a father from new hampshire and a student at massachusetts college intersengted in a way -- intersected in a way neither one of them want to forget. nbc's ann thompson has the story. >> reporter: they were strangers just a week ago. >> reporter: look at him, he's trying to outfunny me. >> reporter: terror made them fast friends. do you believe in fate? >> i do now. i do today. how can you not? >> he asked me monday morning, i don't think i would have said yes, but, absolutely. >> reporter: it was fwae-year-old rob wheeler who took the shirt off h